package com.atguigu.gulimall.seckill.scheduled;

import com.atguigu.gulimall.seckill.service.SeckillService;
import lombok.extern.slf4j.Slf4j;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Service;

import java.util.concurrent.TimeUnit;

/**
 * Copyright (c) 2019-2029 星大陆 All Rights Reserved
 * <p>
 * Project: gulimall
 * Package: com.atguigu.gulimall.seckill.scheduled
 * Version: V 1.0
 * <p>
 * 秒杀商品的定时上架
 *     每天晚上3点，上架最近3天需要秒杀的商品
 *      当天:00:00:00  - 23:59:59
 *      明天:00:00:00  - 23:59:59
 *      后天:00:00:00  - 23:59:59
 * <p>
 * Created by guoxiaolong on 2021/01/26 7:27
 */
@Slf4j
@Service
public class SeckillSkuScheduled {

    @Autowired
    SeckillService seckillService;

    @Autowired
    RedissonClient redissonClient;

    private final String upload_lock = "seckill:upload:lock";

    //TODO 幂等性处理
    @Scheduled(cron = "0 * * * * ?")
    public void uploadSeckillSkuLatest3Days() {
        //1、重复上架无需处理
        log.info("上架秒杀的信息...");
        // 分布式锁。所的业务执行完成，状态已经更新完成。释放锁以后。其他人获取到就会拿到最新的状态。
        RLock lock = redissonClient.getLock(upload_lock);
        lock.lock(10, TimeUnit.SECONDS);
        try {
            seckillService.uploadSeckillSkuLatest3Days();
        } finally {
            lock.unlock();
        }
    }
}
